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| the scientific study of interactions among organisms and between organisms and their environment |
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| part of the earth in which life exists including land,water,air,and atmosphere |
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| group of similar organisms that can breed and produce fertile offspring |
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| group of individuals of the same species that live in the same area |
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| assemblage of different populations that live together in a defined area |
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| collection of all the organisma that live in a particular place,together with their nonliving environment |
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| group of ecosystems that have the same climate and dominant communities |
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| organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds;also called a producer |
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| organism that can capture energy from sunlight or chemicals and use it to produce it's own food from inorganic compounds;also called an autoroph |
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| process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches |
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| process by which some organisms,such as certain bactria,use chemical energy to produce carbohydrates |
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| organisms that obtains energy from the foods it consumes;also called a consumer |
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| organism that obtains energy by eating only plants |
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| organism that obtains energy by eating animals |
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| organism that obtains energy by eating plants and animals |
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| organism that feeds on plant and animal remains and other dead matter |
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| organism that breaks down and obtains energy from dead organic matter |
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| series of steps in an ecosystem in which organisms transfer energy by eating and being eatin |
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| network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem |
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| step in a food chain or food web |
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| diagram that shows the relative amounts of energy or matter within each trophic level in a food chain or food web |
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| total amount of living tissue within a given |
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| process in which elements,chemicl compounds,and other forms of matter are passed from one organism to another and from one part of the biosphere to another |
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| process by which water changes from a liquid into an atmosphere gas |
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| loss of water from a plant through its leaves |
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| chemical substance that an organism requires to live |
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| process of converting nitrogen gas into ammomia |
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| conversion of nitrates into nitrogen gas |
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| rate at which organic matter is created by producers in an ecosystem |
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| single nutrient that eitherisscarce or cycles very slowly,limiting the growth of organisms in an ecosystem |
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